Stapling device with flex cable and tensioning mechanism

ABSTRACT

A surgical device includes an adapter assembly, a tool assembly supported on a distal portion of the adapter assembly, sensors supported on the tool assembly, a flex cable that is coupled to the sensors and extends from the tool assembly through the adapter assembly, and a tensioner mechanism that is engaged with the flex cable within the adapter assembly to maintain tension in the flex cable.

FIELD

This technology is generally related to stapling devices. More particularly, this technology is directed to powered stapling devices that include flex cables for communicating real time feedback from a distal portion of the stapling device to a handle assembly of the stapling device.

BACKGROUND

Powered surgical stapling devices include sensors to provide real time feedback to a clinician regarding a variety of parameters including pressure strain imposed on tissue and status of a firing stroke of the stapling device. Some powered surgical stapling devices use current sensors to detect electrical current drawn from a motor of the device, or load reading sensors along a drive assembly of the device, as an indicator of the forces required to compress tissue, to form staples, and/or to transect the tissue. Load reading sensors can be used to detect pre-set loads and cause the powered surgical stapling device to react thereto. For example, during clamping of thick tissue, the load will rise to a pre-determined limit where the device can slow clamping to maintain the clamping force as the tissue relaxes. This allows for clamping of thick tissue without damage to such tissue (e.g., serosa tears). Data collected from these sensors may also be used to control the speed of firing, which has been shown to improve staple formation by slowing the stapler speed and lowering the staple firing force. The data may also be used in other aspects of the stapling process such as detecting end stop and emergency stopping to prevent damage to the end effector.

In these stapling devices, a flex cable is sometimes provided to couple the sensors which are typically located in a distal portion of the device, e.g., a tool assembly, with a processor located in a proximal portion of the device, e.g., a handle assembly or robotic controller. In some stapling devices, the tool assembly is secured to an adapter assembly about a pivot member that facilitates articulation of the tool assembly in relation to the adapter assembly. When the tool assembly is articulated, the tool assembly pulls on the flex cable to extend the flex cable distally from within the adapter assembly. When the tool assembly is returned to a non-articulated position, the flex cable tends to herniate into a joint formed by the pivot member. This may cause damage to the flex cable.

A continuing need exists for a powered stapling device that includes a mechanism to minimize a likelihood that the flex cable will herniate.

SUMMARY

This disclosure is directed to a surgical device that includes an adapter assembly, a tool assembly that is supported on a distal portion of the adapter assembly, sensors supported on the tool assembly, a flex cable that is coupled to the sensors and extends from the tool assembly through the adapter assembly, and a tensioner mechanism that is engaged with the flex cable within the adapter assembly to maintain tension in the flex cable. This disclosure is also directed to a tensioner assembly that is coupled to a flex cable and is configured to maintain tension in the flex cable. The tensioner mechanism is provided to maintain tension in the flex cable to prevent herniation of the flex cable during operation of the surgical device.

Aspects of this disclosure are directed to a surgical device including an adapter assembly, a tool assembly, a flex cable, and a tensioner mechanism. The adapter assembly defines a first longitudinal axis and has a proximal portion and a distal portion. The body of the adapter assembly defines a recess. The tool assembly defines a second longitudinal axis and is supported on the distal portion of the adapter assembly. The tool assembly supports a sensor and is pivotable between a non-articulated position in which the first and second longitudinal axes are aligned and articulated positions in which the first and second axes are misaligned. The flex cable has a distal portion and a proximal portion. The distal portion of the flex cable is fixedly coupled to the sensor and the proximal portion extends from the proximal portion of the adapter assembly. The tensioner mechanism is supported in the recess of the body of the adapter assembly and includes a sled and a biasing member. The sled is secured to the flex cable and is movable within the recess of the body of the adapter assembly from a first position towards a second position to provide tension in the flex cable. The biasing member is positioned to urge the sled towards the second position.

Further aspects of the disclosure are directed to a surgical stapling device that includes an adapter assembly, a tool assembly, a flex cable, and a tensioner mechanism. The adapter assembly defines a first longitudinal axis and has a proximal portion and a distal portion. The adapter assembly includes a body defining a recess. The tool assembly defines a second longitudinal axis and is supported on the distal portion of the adapter assembly. The tool assembly includes an anvil and a cartridge assembly. The cartridge assembly has a staple cartridge. The tool assembly supports a sensor and is pivotable between a non-articulated position in which the first and second longitudinal axes are aligned and articulated positions in which the first and second axes are misaligned. The flex cable has a distal portion, a central portion, and a proximal portion. The distal portion is fixedly coupled to the sensor and the proximal portion extends from the proximal portion of the adapter assembly. The tensioner mechanism is supported in the recess of the body of the adapter assembly and includes a sled and a biasing member. The sled is secured to the flex cable and is movable within the recess of the body of the adapter assembly from a first position towards a second position to provide tension in the flex cable. The biasing member is positioned to urge the sled towards the second position.

Other aspects of the disclosure are directed to a flex cable and tensioner assembly that includes a flex cable and a tensioner mechanism. The flex cable has a distal portion, a central portion, and a proximal portion. The distal portion extends from the central portion in a first direction and the proximal portion extends from the central portion in a second direction opposite to the first direction. The tensioner mechanism is supported on the flex cable and includes a sled and a biasing member. The sled is secured to the flex cable and the biasing member is engaged with the sled to urge the sled towards the second position.

In aspects of the disclosure, the sled includes a sled base and a sled cover.

In some aspects of the disclosure, the sled base is positioned on a first side of the flex cable and the sled cover is positioned on a second side of the flex cable.

In certain aspects of the disclosure, the sled cover is pivotably coupled to the sled base and fixedly coupled to the flex cable.

In aspects of the disclosure, the sled base includes a body and a post that extends distally from the body within the recess.

In some aspects of the disclosure, the biasing member is positioned about the post between the body of the sled base and a wall of the body of the adapter assembly to urge the sled towards the second position.

In certain aspects of the disclosure, the flex cable includes a central portion that is positioned adjacent the recess, and the sled is secured to the central portion of the flex cable.

In aspects of the disclosure, the distal portion of the flex cable is bifurcated and includes first and second leg portions.

In some aspects of the disclosure, the tool assembly includes an anvil and a cartridge assembly, and the anvil is coupled to the cartridge assembly such that the tool assembly is movable between open and clamped positions.

In certain aspects of the disclosure, the surgical device includes a handle assembly that is coupled to the proximal portion of the adapter assembly.

In aspects of the disclosure, the handle assembly includes a processor, and the proximal portion of the flex cable extends into the handle assembly and communicates with the processor.

Other features of the disclosure will be appreciated from the following description.

BRIEF DESCRIPTION OF DRAWINGS

Various aspects of a surgical device are described herein below with reference to the drawings, wherein:

FIG. 1 is a side perspective view of aspects of the disclosed stapling device with a tool assembly in a non-articulated position;

FIG. 2 is a side perspective view of an adapter assembly and tool assembly of the stapling device shown in FIG. 1 with an outer housing of the adapter assembly of the stapling device removed;

FIG. 3 is a side perspective view of a flex cable and tensioner mechanism of the stapling device shown in FIG. 1;

FIG. 4 is an exploded, side perspective view of a central portion of the flex cable and tensioner mechanism shown in FIG. 3;

FIG. 5 is an enlarged view of the indicated area of detail shown in FIG. 2;

FIG. 6 is a side perspective view of a rotary sled of the flex cable and tensioner mechanism shown in FIG. 5;

FIG. 7 is a side cross-sectional view taken along section line 7-7 of FIG. 5 illustrating a central portion of the adapter assembly of the stapling device shown in FIG. 1 with the tool assembly in a non-articulated position;

FIG. 8 is a top view of a distal portion of the stapling device shown in FIG. 1 with the tool assembly in a non-articulated position shown in phantom;

FIG. 9 is an enlarged view of the indicated area of detail shown in FIG. 8;

FIG. 10 is a perspective view of a distal portion of the stapling device shown in FIG. 1 with the tool assembly in an articulated position;

FIG. 11 is a top view of the distal portion of the stapling device shown in FIG. 1 with the tool assembly in an articulated position shown in phantom;

FIG. 12 is an enlarged view of the indicated area of detail shown in FIG. 11; and

FIG. 13 is a cross-sectional view taken along section line 13-13 of FIG. 11.

DETAILED DESCRIPTION

The disclosed surgical device with a flex cable and tensioner mechanism will now be described in detail with reference to the drawings in which like reference numerals designate identical or corresponding elements in each of the several views. However, it is to be understood that aspects of the device disclosed are merely exemplary of the disclosure and may be embodied in various forms. Well-known functions or constructions are not described in detail to avoid obscuring the disclosure in unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the disclosure in virtually any appropriately detailed structure. In addition, directional terms such as front, rear, upper, lower, top, bottom, distal, proximal, and similar terms are used to assist in understanding the description and are not intended to limit the disclosure.

In this description, the term “proximal” is used generally to refer to that portion of the device that is closer to a clinician, while the term “distal” is used generally to refer to that portion of the device that is farther from the clinician. In addition, the term “clinician” is used generally to refer to medical personnel including doctors, nurses, and support personnel.

This disclosure is directed to a surgical device including an adapter assembly and a tool assembly that can articulate in relation to the adapter assembly. The stapling device includes sensors in a distal portion of the surgical device that are coupled to a processor in a proximal portion of the surgical device by a flex cable. The surgical device includes a flex cable tensioner mechanism to maintain tension in the flex cable and prevent herniation of the flex cable during articulation of the tool assembly.

FIG. 1 illustrates a surgical device shown generally as stapling device 10 that includes a handle assembly 12, an elongate body or adapter 14 that defines a longitudinal axis “X”, and a tool assembly 16. As illustrated, the handle assembly 12 is powered and includes a stationary handgrip 18 and actuation buttons 20. The actuation buttons 20 are operable to actuate various functions of the tool assembly 16 via the adapter assembly 14 including approximation, stapling, dissection, and/or articulation. In certain aspects of the disclosure, the handle assembly 16 supports batteries (not shown) that provide power to the handle assembly 12 to operate the stapling device 10. In some aspects of the disclosure, the stapling device 10 includes a rotation knob 24 that is rotatably coupled to the handle assembly 12 and supports the adapter assembly 14 to facilitate rotation of the adapter assembly 14 and tool assembly 16 in relation to the handle assembly 12. Although the stapling device 10 is illustrated as a powered stapling device, it is envisioned that the advantages of this disclosure are suitable for use with manually powered surgical stapling devices, robotically controlled stapling devices, and other surgical devices that require connection between sensors supported in a distal portion of a surgical device and a processor located in a proximal portion of the surgical device.

The tool assembly 16 of the stapling device 10 defines a longitudinal axis “Y” (FIG. 10) and is coupled to the adapter assembly 14 by a pivot member 24 that defines a pivot axis “Z”. The tool assembly 16 can pivot about the pivot axis “Z” between a non-articulated position in which the longitudinal axis “Y” (FIG. 10) of the tool assembly 16 is coaxial with the longitudinal axis “X” of the adapter assembly 14 and articulated positions in which the longitudinal axis “Y” of the tool assembly 16 defines different angles with the longitudinal axis “X” of the adapter assembly 14. In aspects of the disclosure, the tool assembly 16 includes a cartridge assembly 30 and an anvil 32. The cartridge assembly 30 and the anvil 32 are coupled together such that the tool assembly 16 can pivot between open and clamped positions. The cartridge assembly 30 includes a channel member 34 (FIG. 3) and a staple cartridge 36 that is received within the channel member 34. In aspects of the disclosure, the staple cartridge 36 is releasably coupled to the channel member 34 to facilitate replacement of a spent staple cartridge 36 and reuse of the stapling device 10. U.S. Publication No. 2019/0388091 (hereinafter “the '091 publication”) discloses a powered surgical stapling device and describes a handle assembly suitable for use with the stapling device 10 in further detail.

FIG. 2 illustrates the portion of the stapling device 10 (FIG. 1) that is positioned distally of the handle assembly 12 including the rotation knob 24, the adapter assembly 14, and the tool assembly 16. The stapling device 10 (FIG. 1) includes sensors 40, e.g., strain gauges (shown schematically in FIG. 1), that are supported in the tool assembly 16 and a processor 42 (shown schematically in FIG. 1) that is supported in the handle assembly 12. The sensors 40 and the processor 42 are connected together by a flex cable 50 that extends from the handle assembly 12, through the adapter assembly 14, past the pivot axis “Z”, and into the tool assembly 16. The sensors 40 provide real time feedback to a clinician regarding a variety of parameters including pressure strain imposed on tissue and status of a firing stroke of the stapling device 10. Data from the sensors 40 is communicated to the processor 42 in the handle assembly 12 via the flex cable 50. The '091 Publication describes a surgical device 10 including the construction and function of sensors, a flex cable, and a processor in further detail.

The adapter assembly 14 includes a body 52 that supports the flex cable 50 along its length between the handle assembly 12 (FIG. 1) and the tool assembly 16. The body 52 defines a recess 54 (FIG. 7) that supports a tensioner mechanism 60 that is coupled to a central portion of the flex cable 50 and is described in detail below. The adapter assembly 14 includes an outer housing 56 (shown in phantom in FIG. 2) that is received about the body 52 and confines the tensioner mechanism 60 within the recess 54 of the body 52. In aspects of the disclosure, the outer housing 56 includes a cylindrical tube although other configurations are envisioned.

FIGS. 2-9 illustrate the flex cable 50 and the tensioner mechanism 60. The flex cable 50 (FIG. 4) includes an elongate body which can be formed from a substrate that includes one or more dielectric layers, one or more conductive layers, and one or more resistive layers. Alternately, the flex cable 50 can be formed of a variety of different materials having a variety of different configurations that are capable of electrically coupling the sensors 40 (FIG. 1) to the processor 42 (FIG. 2). In aspects of the disclosure, the flex cable 50 has linear proximal portion 50 a (FIG. 4), a central portion 50 b and a bifurcated distal portion 50 c. The proximal portion 50 a extends proximally from the central portion 50 b of the flex cable 50, through the adapter assembly 14, and into the handle assembly 12. The central portion 50 b of the flex cable 50 is engaged with the tensioner mechanism 60 and is positioned adjacent the recess 54 of the body 52 of the adapter assembly 14. The bifurcated distal portion 50 c of the flex cable 50 includes leg portions 64 (FIG. 4) that extend from the central portion 50 b of the flex cable 50, through the adapter assembly 14, about the pivot member 26, and into the tool assembly 16. The distal ends of the leg portions 64 are fixedly secured within the tool assembly 16 and are coupled to the sensors 40 (FIG. 1). Although the distal portion 50 c of the flex cable 50 is shown to be bifurcated, it is envisioned that the distal portion 50 c of the flex cable 50 can include a single leg like the proximal portion 50 a of the flex cable 50.

The tensioner mechanism 60 (FIG. 4) includes a sled 66 (FIG. 7) and a biasing member 72. The sled 66 includes a sled base 68 and a sled cover 70. The sled base 68 includes a body 74 and a post 76 that extends distally from the body 74. The body 74 defines a through bore 78 (FIG. 4). The sled cover 70 (FIG. 6) includes a body 80 (FIG. 6), and protrusions 82 and a post 84 that extend from the body 80 towards the sled base 68. The post 84 includes a head 84 a that has a diameter that is greater than the diameter of the remaining portion of the post 84.

The central portion 50 b of the flex cable 50 defines openings 86 (FIG. 4). In aspects of the disclosure, the central portion 50 b of the flex cable 50 defines three openings 86 including two distal openings and a proximal opening. The protrusions 82 of the sled cover 70 are received through the distal openings 86 of the flex cable 50 and the post 84 of the sled cover 70 is received through the proximal opening 86 of the flex cable 50. The post 84 is also received within the through bore 78 of the body 74 of the sled base 74 to pivotably secure the sled base 68 to the sled cover 70 and to secure the sled base 68 and the sled cover 70 to opposite sides of the central portion 50 b of the flex cable 50. In aspects of the disclosure, the head 84 a of the post 84 has a diameter that is larger than the diameter of the through bore 78 of the body 74 of the sled base 74 to retain the post 84 within the through bore 78. In aspects of the disclosure, the head 84 a can be formed of a resilient material to facilitate insertion of the post 84 through the through bore 78. Although the sled cover 70, the sled base 68, and the flex cable 50 are shown to be secured together with the protrusions 82 and the post 84, it is envisioned that the sled base 68 and sled cover 70 could be secured to the flex cable 50 using a variety of different types of fasteners including adhesives, screws, welding, or the like. It is also envisioned that the sled 66 could be formed of an integral sled member that is secured to only one side of the flex cable 50.

FIGS. 7-9 illustrate views of a central portion of the adapter assembly 14 with the tensioner mechanism 60 secured to the flex cable 50 and positioned within the recess 54 of the body 52 of the adapter assembly 14. When the tensioner mechanism 60 is secured to the flex cable 50 and positioned within the recess 54 of the body 52, the post 76 extends distally from the body 74 of the sled base 68 within the recess 54. In aspects of the disclosure, the biasing member 72 includes a coil spring that is received about the post 76 and is compressed between the body 74 of the sled base 68 and a distal wall 84 of the body 52 of the adapter assembly 14. In this position, the sled 66 is urged proximally within the recess 54 of the body 52 of the adapter assembly 14 to pull the distal portion 50 c and central portion 50 b of the flex cable 50 proximally within the recess 54. As described above, the distal portion 50 c of the flex cable 50 is fixedly secured within the tool assembly 16 (FIG. 2). As such, the distal portion 50 c is placed in tension by the tensioner mechanism 60. When the sled 66 of the tensioner mechanism 60 is in its proximal-most position, the sled 66 is engaged with a proximal wall 86 (FIG. 7) of the body 52 of the adapter assembly 14 that defines the recess 54.

FIGS. 10-13 illustrate the stapling device 10 when the tool assembly 16 is moved to an articulated position. When the tool assembly 16 is moved to an articulated position about pivot member 26 in the direction of arrow “A” in FIG. 10, the distal portion 50 c of the flex cable 50 that is positioned radially outward of the pivot axis “Z” (FIG. 1) is pulled distally about the pivot member 26 in the direction indicated by arrow “B” in FIG. 11. When the distal portion 50 c of the flex cable 50 includes bifurcated portions 64, the bifurcated portion 64 of the distal portion 50 c of the flex cable 50 positioned inwardly of the pivot member 26 will be move proximally within the adapter assembly 14 in the direction of arrow “C” in FIG. 11 and the bifurcated portion 64 positioned outwardly of the pivot member 26 will move distally in the direction of arrow “B” in FIG. 11. When the bifurcated portion 64 of the flex cable 50 moves distally, the central portion 50 b of the flex cable 50 will move distally within the recess 54 of the body 52 of the adapter assembly 14. This distal movement will cause the sled 66 to move distally within the recess 54 of the body 52 of the adapter assembly 14 in the direction of arrow “D” in FIG. 13 against the urging of the biasing member 72. The biasing member 72 will continue to apply a force on the sled 66 of the tensioner mechanism 60 to apply a force on the flex cable 50 to maintain tension in the flex cable 50 when the tool assembly 16 is in an articulated position.

When the tool assembly 16 is returned to a non-articulated position (FIG. 1) from an articulated position (FIG. 10), the tensioner mechanism 60 maintains tension in the distal portion 50 c and pulls the flex cable 50 proximally in the direction of arrow “E” in FIG. 13 to prevent herniation of the flex cable 50 in the area of the pivot member 26 (FIG. 10). When the tool assembly 16 returns to the non-articulated position (FIG. 1), the sled 66 returns to a retracted position in which the sled 66 is engaged with the wall 78 of the body 52 of the adapter assembly 14.

Herniation of the flex cable 50 in the area of the pivot member 26 may cause the flex cable 50 to become compressed between the tool assembly 16 and the adapter assembly 14 and damaged. This damage may prevent the translation of data between the sensors 40 in the tool assembly 16 and the processor in the handle assembly 12 (or robotic controller) to prevent operation and/or proper operation of the surgical device.

As described above, when the flex cable 50 has a bifurcated distal portion including a bifurcated portion 64 positioned inwardly and outwardly of the pivot member 26, the bifurcated portion 64 positioned inwardly of the pivot member 26 will move proximally while the bifurcated portion 64 positioned outwardly of the pivot member 26 will move distally. In order to compensate for the different directions of movement, the distal openings 86 in the central portion 50 b of the flex cable 50 are slightly elongated such that the 82 protrusions 82 on the sled cover 70 can slide within the distal openings 86. This allows the sled cover 70 to pivot in relation to the sled base 68 as the central portion 50 b of the flex cable 50 is twisted in response to the movement of the bifurcated portions 64 of the distal portion of the flex cable 50 in different directions.

Persons skilled in the art will understand that the devices and methods specifically described herein and illustrated in the accompanying drawings are non-limiting exemplary aspects of the disclosure. It is envisioned that the elements and features illustrated or described in connection with one exemplary embodiment may be combined with the elements and features of another without departing from the scope of the present disclosure. As well, one skilled in the art will appreciate further features and advantages of the disclosure based on the above-described aspects of the disclosure. Accordingly, the disclosure is not to be limited by what has been particularly shown and described, except as indicated by the appended claims. 

What is claimed is:
 1. A surgical device comprising: an adapter assembly defining a first longitudinal axis and having a proximal portion and a distal portion, the adapter assembly including a body defining a recess; a tool assembly defining a second longitudinal axis supported on the distal portion of the adapter assembly, the tool assembly supporting a sensor and being pivotable between an non-articulated position in which the first and second longitudinal axes are aligned and articulated positions in which the first and second axes are misaligned; a flex cable having a distal portion and a proximal portion, the distal portion of the flex cable being fixedly coupled to the sensor and the proximal portion of the flex cable extending from the proximal portion of the adapter assembly; and a tensioner mechanism supported in the recess of the body of the adapter assembly, the tensioner mechanism including a sled and a biasing member, the sled being secured to the flex cable and being movable within the recess of the body of the adapter assembly from a first position towards a second position to provide tension in the flex cable, the biasing member positioned to urge the sled towards the second position.
 2. The surgical device of claim 1, wherein the sled includes a sled base and a sled cover, the sled base positioned on a first side of the flex cable and the sled cover positioned on a second side of the flex cable.
 3. The surgical device of claim 2, wherein the sled cover is pivotably coupled to the sled base and fixedly coupled to the flex cable.
 4. The surgical device of claim 3, wherein the sled base includes a body and a post that extends distally from the body within the recess, the biasing member being positioned about the post between the body of the sled base and a wall of the body of the adapter assembly to urge the sled towards the second position.
 5. The surgical device of claim 1, wherein the flex cable includes a central portion positioned adjacent the recess, and the sled is secured to the central portion of the flex cable.
 6. The surgical device of claim 1, wherein the distal portion of the flex cable is bifurcated and includes first and second leg portions.
 7. The surgical device of claim 1, wherein the tool assembly includes an anvil and a cartridge assembly, the anvil being coupled to the cartridge assembly such that the tool assembly is movable between open and clamped positions.
 8. The surgical device of claim 1, further including a handle assembly coupled to the proximal portion of the adapter assembly, the handle assembly including a processor, the proximal portion of the flex cable extending into the handle assembly and communicating with the processor.
 9. A flex cable and tensioner assembly comprising: a flex cable having a distal portion, a central portion, and a proximal portion, the distal portion extending from the central portion in a first direction and the proximal portion extending from the central portion in a second direction opposite to the first direction; and a tensioner mechanism supported on the flex cable, the tensioner mechanism including a sled and a biasing member, the sled being secured to the flex cable and the biasing member is engaged with the sled to urge the sled towards the second position.
 10. The flex cable and tensioner assembly of claim 9, wherein the sled includes a sled base and a sled cover, the sled base positioned on a first side of the flex cable and the sled cover positioned on a second side of the flex cable.
 11. The flex cable and tensioner assembly of claim 10, wherein the sled cover is pivotably coupled to the sled base and fixedly coupled to the flex cable.
 12. The flex cable and tensioner assembly of claim 11, wherein the sled base includes a body and a post that extends distally from the body, the biasing member being positioned about the post and engaged with the body to urge the sled towards the second position.
 13. The flex cable and tensioner assembly of claim 9, wherein the sled is secured to the central portion of the flex cable.
 14. The flex cable and tensioner assembly of claim 9, wherein the distal portion of the flex cable is bifurcated and includes first and second leg portions.
 15. A surgical stapling device comprising: an adapter assembly defining a first longitudinal axis and having a proximal portion and a distal portion, the adapter assembly including a body defining a recess; a tool assembly defining a second longitudinal axis supported on the distal portion of the adapter assembly, the tool assembly including an anvil and a cartridge assembly, the cartridge assembly having a staple cartridge, the tool assembly supporting a sensor and being pivotable between a non-articulated position in which the first and second longitudinal axes are aligned and articulated positions in which the first and second axes are misaligned; a flex cable having a distal portion, a central portion, and a proximal portion, the distal portion being fixedly coupled to the sensor and the proximal portion extending from the proximal portion of the adapter assembly; and a tensioner mechanism supported in the recess of the body of the adapter assembly, the tensioner mechanism including a sled and a biasing member, the sled secured to the flex cable and movable within the recess of the body of the adapter assembly from a first position towards a second position to provide tension in the flex cable, the biasing member positioned to urge the sled towards the second position.
 16. The surgical stapling device of claim 15, wherein the sled includes a sled base and a sled cover, the sled base positioned on a first side of the flex cable and the sled cover positioned on a second side of the flex cable.
 17. The surgical stapling device of claim 16, wherein the sled cover is pivotably coupled to the sled base and fixedly coupled to the flex cable.
 18. The surgical stapling device of claim 17, wherein the sled base includes a body and a post that extends distally from the body within the recess, the biasing member being positioned about the post between the body of the sled base and a wall of the body of the adapter assembly to urge the sled towards the second position.
 19. The surgical stapling device of claim 15, wherein the flex cable includes a central portion positioned adjacent the recess, and the sled is secured to the central portion of the flex cable.
 20. The surgical stapling device of claim 19, wherein the distal portion of the flex cable is bifurcated and includes first and second leg portions. 